hateoas.Link is not marked as ignorable

[Rocks360]

Hello,
I get the following error when I try to consume a api with restTemplate

Sat Dec 10 17:11:23 CET 2016
There was an unexpected error (type=Bad Request, status=400).
Could not read document: Unrecognized field "templated" (class org.springframework.hateoas.Link), not marked as ignorable (one known property: "href"]) at [Source: java.io.PushbackInputStream@7a06aed1; line: 10, column: 25] (through reference chain: org.springframework.hateoas.Resource["_links"]->org.springframework.hateoas.Link["templated"]); nested exception is com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "templated" (class org.springframework.hateoas.Link), not marked as ignorable (one known property: "href"]) at [Source: java.io.PushbackInputStream@7a06aed1; line: 10, column: 25] (through reference chain: org.springframework.hateoas.Resource["_links"]->org.springframework.hateoas.Link["templated"])

I restTemplate request is the following:

ResponseEntity<Resource<Cart>> responseEntity = restTemplate.exchange(cartUrl, HttpMethod.GET, 
null, new ParameterizedTypeReference<Resource<Cart>>() {});

The response of the Rest api is the following:

{
  "creationDate": "2016-12-10T14:30:25.000+0000",
  "totalAmount": 501,
  "_links": {
    "self": {
      "href": "http://localhost:8082/carts/1"
    },
    "cart": {
      "href": "http://localhost:8082/carts/1{?projection}",
      "templated": true
    },
    "checkout": {
      "href": "http://localhost:8083/order"
    },
    "items": {
      "href": "http://localhost:8082/carts/1/items"
    }
  }
}

It already looked in the hateoas.Link class and the Annotation to ignore the "templated" property is already set but not recognized I guess.

[odrotbohm]

Do you have your ObjectMapper configured to ignore unknown fields?

[Rocks360]

Yes I did it like the following:

ObjectMapper objectMapper = new ObjectMapper(); 
		 objectMapper.registerModule(new Jackson2HalModule()); 
		 // todo: show if fix for Link property JsonIgnoreProperty templated is done
                 objectMapper.configure(DeserializationFeature.FAIL_ON_IGNORED_PROPERTIES, false); 
		 //objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); 

The FAIL_ON_IGNORED_PROPERTIES is default as false but I added it to make sure that no exeption is thrown if there is a value that should be explicit be ignored. If I comment that line out and use the below line it works. But the templated value is marked as ignorable so I'm wondering why it's not working without setting the FAIL_ON_UNKNOWN_PROPERTIES to false.

[odrotbohm]

template is ignored, not isTemplated(). The latter cannot be ignored as it needs to render in responses obviously. The weirdness of that default in Jackson has been brought up with Jackson already. Also, Spring Boot actually reverts that, so if you consume a RestTemplate or ObjectMapper from the Spring ApplicationContext you're gonna get this set properly.

[Rocks360]

Oh okay yes. Thank you for the answers.